.NET Disassembling, edit and patch

Question

I need to edit a .NET executable. I'm new to HEX editing. I have imported it to IDA 6.1 Pro and edited it in IDA-View Window.

Original:

ldstr    "Uri : "

I changed to (Right click>Manual...(Manual Operand)):

ldstr    "Uri : localhost"

I have installed PatchDiff2 (IDA Plugin), but this does not work for me:

Scanning for functions ...
parsing second idb...
Error: IDB2 parsing cancelled or failed.

Is there another way to commit changes to executable? The original byte value is: 72 BD 1B 00 70 02 7B 59 00 00 04 28 1B 00 00 0A

How do I get the (I need it to patch from Edit\Patch program\chenge Bytes) new HEX value of

ldstr    "Uri : localhost"

Answer 1

I use ildasm instead of IDA. And it work perfect.

IDA would not be my first choice of tool. Just use ildasm.exe to decompile the assembly, edit the IL, put humpty-dumpty back together with ilasm.exe

Thanks to Hans Passant